package cn.linstudy.handler.impl;

import cn.linstudy.vo.result.ResponseBean;
import cn.linstudy.glue.GlueTypeEnum;
import cn.linstudy.handler.IJobHandler;
import cn.linstudy.log.JobFileAppender;
import cn.linstudy.log.JobLogger;
import cn.linstudy.utils.ScriptUtils;
import cn.linstudy.utils.ShardingUtils;
import java.io.File;


/**
 * @Author XiaoLin
 * @Date 2022/1/8 15:05
 * @Description
 */
public class ScriptJobHandler extends IJobHandler {

    private int jobId;
    private long glueUpdatetime;
    private String gluesource;
    private GlueTypeEnum glueType;

    public ScriptJobHandler(int jobId, long glueUpdatetime, String gluesource, GlueTypeEnum glueType){
        this.jobId = jobId;
        this.glueUpdatetime = glueUpdatetime;
        this.gluesource = gluesource;
        this.glueType = glueType;

        // clean old script file
        File glueSrcPath = new File(JobFileAppender.getGlueSrcPath());
        if (glueSrcPath.exists()) {
            File[] glueSrcFileList = glueSrcPath.listFiles();
            if (glueSrcFileList!=null && glueSrcFileList.length>0) {
                for (File glueSrcFileItem : glueSrcFileList) {
                    if (glueSrcFileItem.getName().startsWith(String.valueOf(jobId)+"_")) {
                        glueSrcFileItem.delete();
                    }
                }
            }
        }

    }

    public long getGlueUpdatetime() {
        return glueUpdatetime;
    }

    @Override
    public ResponseBean<String> execute(String param) throws Exception {

        if (!glueType.isScript()) {
            return new ResponseBean<String>(IJobHandler.FAIL.getCode(), "glueType["+ glueType +"] invalid.");
        }

        // cmd
        String cmd = glueType.getCmd();

        // make script file
        String scriptFileName = JobFileAppender.getGlueSrcPath()
            .concat(File.separator)
            .concat(String.valueOf(jobId))
            .concat("_")
            .concat(String.valueOf(glueUpdatetime))
            .concat(glueType.getSuffix());
        File scriptFile = new File(scriptFileName);
        if (!scriptFile.exists()) {
            ScriptUtils.markScriptFile(scriptFileName, gluesource);
        }

        // log file
        String logFileName = JobFileAppender.contextHolder.get();

        // script params：0=param、1=分片序号、2=分片总数
        ShardingUtils.ShardingVO shardingVO = ShardingUtils.getShardingVo();
        String[] scriptParams = new String[3];
        scriptParams[0] = param;
        scriptParams[1] = String.valueOf(shardingVO.getIndex());
        scriptParams[2] = String.valueOf(shardingVO.getTotal());

        // invoke
        JobLogger.log("----------- script file:"+ scriptFileName +" -----------");
        int exitValue = ScriptUtils.execToFile(cmd, scriptFileName, logFileName, scriptParams);

        if (exitValue == 0) {
            return IJobHandler.SUCCESS;
        } else {
            return new ResponseBean<String>(IJobHandler.FAIL.getCode(), "script exit value("+exitValue+") is failed");
        }

    }

}
